Method of cross-dyeing fabrics



. Patented June} 30, 1931 UNITED STATES PATENT ounce ARTHUR s. noBEms, or nENnEnsonvILLE, NORTH CAROLINA mn'r non or (moss-Drums FABRICS No Drawing. Application filed December 17, 1927, Serial No. 240,919. Renewed December 11, 1930.

blue R. Schultz Number 1188, new red R,

,My invention relates to a process of dyeing cotton and that type of regenerated cellulose known as xanthate silk, or viscose, when-woven in the same fabric.

,6 An object of my invention is to provide a combination of certain dyestuffs and chemicals which will act to dye either the cotton or a type of regenerated cellulose and leave the other portion of the fabric undyed.

videa process of dyeing fabrics woven from cotton and certain types of regenerated cellulose in which the cotton may be dyed one color and the regeneratedjcellulose dyed 'another color.- I 4 1 It has heretofore been claimed by those skilled in the art of dyeing fabrics that a fabric composed ofootton andxanthat'e silk or viscose cannot be dyed in any manner other than that of dyeing bothv the cotton and the xanthate silk or viscose of the same color, due to the fact that cotton and viscose liiave practically the same afiinity for all es. It is the purpose of this invention to set forth a method and means whereby cotton and viscose, or xanthate silk, can be made to accept certain and distinct colors when W0- a certain careful selection of dyes \for the purpose and by regulating the temperatures of the dye baths as well as regulatin the d to t amount of chemicals adde dye ath, and by dyeingeach fiber in a separate dye dyeing. I am aware that the art of'cross-" "dyeing has been used heretofore for various textiles woven of different materials, but,

as stated, there has not heretofore been used any method whereby cotton and regenerated cellulose of the viscose type, when woven in the sa-mdfabric can be dyed separate and distinct colors either by separate dyeing or by one operation.

: I have discovered by usin g certain families of neutral dyein 'acid wool dyes, such as wool yellow ex. Se ultz Number 23, wool Another object of my invention is to proven, spun or knitted into the same fabricby bath, or in some cases, by combining the.

' Schultz Number 168 and the likewhich will when combined with .glycerine, or acidified boil off oil to act as a penetrant, will when introduced 'into' a dye machine containing sufficient water at a temperature, of approximately 180 degrees Fahrenheit together with or without the addition of sodium sulphate or Glaubers salt form a dyebath that will dye the viscose or xanthate silk to the color and shade desired, and leave the cotton un- "dyed or only slightly stained. It is, of

course, to be understood that one or more of the dyes such as wool yellow extra, wool. blue R, or newred 5R may be used at a time,

as in some cases only one of these dyes would be desired, while'a combination of two or more of neutral dyeing. acid dyes might be desired to produce the proper 7 color.

I have also discovered that certain selected substantive or direct dyes, selected from the. group consisting of direct ellow S '2 G, Schultz, No. l0direct rublne B, Schultz No. 3l3direct brilliant blue G, Schultz No.

. 415 and the like, together or without the ad- 'dition of sulphonated oil, will when introduced into a dye'machine containing suflicient water at a temperature of approximately 120 degrees F. form a dyebath that will act to dye the cotton to a-shade' desired and leave the xanthate silk or'viscose uni dyed or only slightly stained. It is, of course, to be understood that I may use all the above named substantive or direct dyes at one timeor may use one or more of the same according to theshade desired to be produced, although I do not desire to be bound by the explanation which follows.

I have found that the best process for the cross-dyeing of cotton and viscose or xanthatesilkwith the dyes above named is substantially as follows for best results: One or more of the neutral acid d es for dyeing the viscose of the neutral aci group is first pasted down with glycerine or slightlyacidified boil oil oil, then dissolved in boiling water and strained into the dye machine with the necessary amount of water for the work, which has been heated to apdissolved and poured into the machine containing sufiicient water at a temperature of approximately 120 degrees Fahrenheit and the goods are likewise given from three to five dips or ends in this dye liquor in order to bring up the shade desired on the cotton part of the fabric. This liquor is again wasted and the goods given a good rinsing in cold water after which the goods are squeezed and dried.

In the case of a combined dyebath, I have found that by making up a dyebath comwetting the fabric with water,

posed of the necessary amount of the wool yellow extra, the acidified boil ofi' oil, the direct rubine B. conc. together with sufficient water at a temperature of approximately 180 degrees Fahrenheit and giving the cloth containing the viscose or xanthate silk and cotton fibres from three to five ends or dips necessary to produce the shade desired, a very beautiful red and gold combination can be produced in one bath at one and the same operation. The last paragraph merely gives an explanation of the results produced by securin two dyes according to my process and I desire it to be understood that any combination of the dyes enumerated in this application may be used when it is desired to produce a certain shade in either the viscose or the cotton fibres.

In the specification, I have set forth a preferred embodiment of my invention, and although specific terms are employed, they are'used in a generic and descriptive sense only and not for purposes of limitation, the scope of my invention being set forth in the appended claims.

I claim:

1. That method of dyeing a fabric composed of viscose and cotton which comprises subjecting the fabric to a dyebath containing neutral dyemg acid dyes selected from the group consisting of wool yellow extra, Schultz Number 23, wool blue R, Schultz Number 188, and new red 5R, Schultz Number 248, and glycerine, rinsing the fabric in water, then subjecting the fabric to a dyebath containlng substantive dyes selected from the ou consisting of direct yellow S 2 (j, Schultz Number 10, direct rubine B concentrated, Schultz Number 313, and direct blue 6G extra, Schultz Number 415 and sulphonated oil, and then rinsing the dyed fabric in water.

2. That method of dyeing a fabric containing viscose and cotton fibres which comprises subjectin the fabric successively to dyebaths containing neutral dyeing acid dyes selected from the group consisting of Wool yellow extra, Schultz Number 23, wool blue R, Schultz Number 188, and new red 5R, Schultz Number 248, and to a bath containing substantive direct dyes selected from the group, consisting ofdirect yellow S 2 G, Schultz Number 10, direct rubine B concentrated, Schultz Number 313, and direct blue 6 G extra, Schultz Number 415.

3. That method of cross-dyeing a fabric containing viscose and cotton fibres which comprises subjecting the fabric to a dyebath containingneutral dyeing acid dyes selected from the group consisting of wool yellow extra, Schultz Number 23, wool blue R,

Schultz Number 188, and new red 5R,

Schultz Number 248, heated to a temperature of approximately 180 degrees Fahrenheit, and then subjecting the fabric to a substantive direct dyebath selected from the group consisting of direct yellow S 2 G, Schultz Number 10, direct rubine B concentrated, Schultz Number 313, and direct blue 6 G extra, Schultz Number 415 heated to a temperature of approximately 120 degrees Fahrenheit.

4. That method of cross-dyeing a fabric containing viscose and cotton fibres which comprises subjecting the fabric to a dyebath containing neutral acid dyes selected from the group consisting of wool yellow extra, Schultz Number 23, wool blue R4, Schultz Number 188, and new red 5R, Schultz Number 248 to dye the viscose and then subjecting the fabric to a dyebath con taining substantive direct dyes selected from the group consisting of direct yellow S 2 G, Schultz Number 10, direct rubine B concentrated, Schultz Number 313, and direct'blue 6 G extra, Schultz Number 415 to dye the cotton fibres.

5'. That method of dyeing a fabric composed of viscose and cotton to impart one color to the viscose and another color to the cotton which comprises subjecting the fabric to a dyebath containing neutral dyeing acid dyes selected from the group consisting of wool yellow extra, .Schultz Number 23, wool blue R, Schultz Number 188, and new red 5R, Schultz Number 248; to dye the viscose fibres and then subjecting the fabric to a dyebath containing, substantive direct dyes selected from the group consisting of direct 'yellow S 2 G, Schultz Number 10, direct 6. That method of dyeing a fabric composed of viscose and cotton fibres to impart different colors to the two sets of fibres which comprises subjecting the fabric to a dyebath containing neutral dyeingacid dyes selected from the group consisting of wool yellow extra, Schultz Number 23, wool blue R, Schultz Number 188, and new red 5R,

Schultz Number 248 and then subjecting the fabric to a dyebath containing substantive dyes selected from the group consisting of direct yellow S 2 G, Schultz Number 10, direct rubine B concentrated, Schultz Number 313, and direct blue 6 G extra,

Schultz Number 415 and acidified boil oil? oil, whereby the'viscose fibres are dyed one color and the cotton fibres are dyed another color.

7 That method of dyeing a fabric composed of regenerated cellulose and cotton fibres to impart different colors to the two sets of fibres which comprises subjecting the fabric to a dyebath containing neutral dye ing acid dyes selected from the group consisting of wool yellow extra, Schultz Number 23, wool blue R, Schultz Number 188, and new red 5R, Schultz Number 248 and then subjecting the fabric to a dyebath containing substantive dyes selected from the group consisting of direct yellow S 2 G, Schultz Number 10, direct rubine B concentrated, Schultz Number 313, and direct blue 6 G extra, Schultz Number 415 and acidified boil off oil, whereby theregenerated cellulose fibres are dyed one color and the cotton fibres are dyed another color.

8. That method of dyeing a fabric comprising viscose and cotton fibres, which comprises subjecting the fabric to a dyebath containing neutral'dyeing acid dyes selected from the group consisting of wool yellow extra, Schultz Number 23, wool blue R, Schultz Number 188, and new red 5R,

4U Schultz Number 248 to dye the viscose fibres and to leave the cotton fibres substantially undyed. i

' In-testimony. whereof I aifix my signature.

'ARTHUR S. ROBERTS. 

